🌐 Three-Way Handshake: How TCP Connections are Built

🌐 Three-Way Handshake: How TCP Connections are Built

How do two computers establish a reliable, trusted connection before sending any actual data? Through the Three-Way Handshake.

Here are the key points:
🔹 1. What is it?
A three-step synchronization process used by TCP to ensure both client and server are ready to communicate before data transmission begins.
🔹 2. The 3 Steps Explained
Step 1 (SYN): The client sends a SYN (Synchronize) packet to the server asking, "Can we connect?"
Step 2 (SYN-ACK): The server replies with a SYN-ACK packet stating, "I hear you, and I am ready to connect!"
Step 3 (ACK): The client sends a final ACK (Acknowledgment) packet saying, "Got it, connection confirmed!"
🔹 3. Security Relevance
Understanding this handshake is vital for cybersecurity, as attackers can exploit it to launch SYN Flood Attacks to overwhelm and crash servers.

🚀 Think of it like a phone call: You dial (SYN), the other person answers and says hello (SYN-ACK), and you reply to start the conversation (ACK)!
👇 Did you know that every single website visit starts with this 3-step handshake? Let me know!

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